How to install ia32-libs on 12.04 LTS (32 Bit)

I am trying to install ia32-libs on Ubuntu 12.04 LTS (x86). I enabled all the repository sources but I'm receiving the error message below:

~$ sudo apt-get install ia32-libs  
Reading package lists... Done  
Building dependency tree         
Reading state information... Done  
Package ia32-libs is not available, but is referred to by another package.  
This may mean that the package is missing, has been obsoleted, or  
is only available from another source  

E: Package 'ia32-libs' has no installation candidate

output of sudo apt-cache policy ia32-libs

ia32-libs:  
  Installed: (none)  
  Candidate: (none)  
  Version table:  

output of cat /etc/apt/sources.list (removed similar hyperlinks)

deb http://archive.ubuntu.com/ubuntu/ precise restricted main multiverse universe  
deb-src archive.ubuntu.com/ubuntu/ precise restricted main multiverse universe #Added by software-properties  
deb security.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse  
deb-src security.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse #Added by software-properties  
deb archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse  
deb-src archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse #Added by software-properties

Solution 1:

That package is only needed when running certain 32 Bit applications on a 64 Bit version of Ubuntu. On 32 Bit / i386 architecture everything (applications, libraries etc) is 32 Bit.

Since you are not trying to install that package for the sake of doing so, what software are you trying to install and what guide or how to do you use?